Electric hair-drier.



W. G. TRIW`I`M1M`Ju ELECTRIC HQIR DRIER. 'APPLICATION msn usc. 2o. 19H.

Patented Mar. 12, i918.

1 HUEZ: i5: wie? 5. 2115221227521 'WALTER G. TR'UIMN, GF GLEVELANB, OHI, ASSIGNOR TO T-IE A. QOMPANY',

' Us? CLEVELAND, QIEI, A CGRATION F GEIQ.

Sgieucsion of Leters Petrini.

To all whom t may concern:

Be it known inst WALTER Gr. Tienneseng e. subjecc of the Emperor o Germany, residing at Cleveland, in the county o Cuyew hoge sind State of Ohio, have invented cer- 5min new and useful :improvements in iiec ric Hnir-Driers, of which the olio'wing `Ineens for varying the heating eiect thereof,

preferably by reguiei'ing iiie sneed of the eiecirie motor. A single con'roiiing swieh is also provided which is adapted to sters ehe fen-motor, connect or disconnect 'ehe essoeiaed electrical heet-unit or n section hereo'n and iineliy disconnect the source of eieetricai energy therefrom. The speed reguleiion, "preferably, is secured by advancing or retreating the .position of the commu- 'mtor-brushes, whereby outside swiching mechanism and resistance coils eonnnonly resorted to, are thus avoided.

Cerwin improved structural deieils wiii be further set forth in the specification; hayn ing reference to the aceoinpenying sheet of drewings,' illustrating my improved electric hair drier Whereinr- Figure l is e View in front elevation of the completely assembled device;

Fig. 2 is e. similar View showing the sidecesing removed to iiiuserate the posiiion of the fen and heat-unit;

Fig. 3 is e fragmentary View ai; right en Fig, e is e top-view of said hair drier;

Fig. 5 is e fragmentary rear View, partly in section to show the inoxbor end eresie edn1 instmenc;

snep-swiicli;

Fig. 'i' is e pien View of Eig.

heeifnnit;

Fi 9 is e de'nii, iiiusireiing en. insuieiingg side-pieee of the ifieaouniiu sind l@ is :in electrical' diagram oli Sie re specire circuits orD e modified device containing subdivided resisience Winding-s. i

Throughout the several figures oi ehe drawing' have empioyed the seme chore@ ier of reference. "io indicate siiniier parte The eieoi'ric motor a shown in Fig,"e 5. and coniained in `the casing a' et ihe rear of rile appliance, may be of eiher direes or niernating-eurrent type. Mouned direcly upon the shaft o of said motor, Wiii he found the funs 0 carried in he intereiiy positioned cesing: L which terminates in en extension d" and has a central opening guarded oy ihe screen ai. A screen-covered een e is disposed over Jche mouth of seid eiension, Wiiiie the interior of the eniension is iined with' eshesos hoard e".

Positioned Within the extension nreiferabiy ai; an angie with dhe s'xis 'shereoi, lhere is provided one or more heeennits'f., @Wing iso the physieei demands mede hereon, this heet-unis preferably is constructed of 'wo side-nieees 5F', formed of inve. or oiiier ssiin 8 is another detail, showing ehe con:` struction of one of the edjusieoie brushes .in

by inerposed sieeves f". The side-pieces ere transversely channeled to receive 'ehe resisance Wire and longitndinaiiy grooved es shown. The heat unit is assenbied ily :means of two transverse bol's and nuts, f2. Around the side-pieces, 1there is Wound the desired resistance condnc'tor g which is covered With insulating heeds" its exiremities, and ierrninafes et she binding iposis g', g, While the heat-unit is mounted in position within he appiience, as shown in The extension di issornewhei: eiongared for ehe purpose of accommodeiing the heetunii'z, es en angie therein, in order to deiiees the einenrrf"- ei? ilse iengeii oi' resisaenee s eoppiied by eine fon conductor for heating the same. Accordingly, said resistance conductor is wound upon the `neat-unit within the grooves provided within the side-pieces, in ladder-like arrangement. rThis provides the best and moet eilicient construction. for apractically instantaneous heater for the air-currents.

y The heatiinit or units of my improved device, preferably are positioned substantially i so in tangential relation to the rotary ian, within the orice ot 'the device. In this position, the air-currents are delivered directly against the heated sections ot the conductor,

and are broken up and delivered Jfrom said- 10 a diagram wherein the motor o is adapt' ed to be connected between the plus and minus-sides of the energizing circuit, by means of the switch-arm a" when it engages contact l, or as the switch-arm is further turned to engage contacts 2 and 3, branch g containing one section of the resistance conductor, is connected in multiple relation with the motor, and when contact 4 is also engaged, branch (/3 containing another section of resistance conductor is likewise connected in circuit; assuming that a sub-divided or duplicated heat-unit is desired for the purpose of increasing the heating eli'ect.

However, I ordinarily prefer to governv the heating'etiect and volume of air-currents produced by the simpler expedient of varying the speed of the motor in the manner in which I shall now explain. Upon referring again to Fig. 5,'it will be seen that the brushes 7c are insulatingly mounted upon a. spring metal yoke Z, which is carried by the armature shaft, while segmental contactsprings m m of said brushes permit their rotation through approximately the quadrant 'of circle, thereby advancing or retractingtheir position with respect to the commutator-and field of the motor. The springs are suiiiciently stiff as they bear against the respective brushes, frictionally to maintain them in their position of rotary adjustment. Accordingly, as the brushes are /rotated reversely to the direction which the armature rotates. the speed ot the latter will be materially increased in proportion to such adjustment of the brushes. Conversely, the reverse adjustment of the brushes will result in reducing the speed at which the armature is driven, depending upon the position in which current is directed through the windings of the armature.

Accordingly, as the speed is increased, the volume of air is proportionately augmented, so that the heating eilect may be very easily controlled with a constant energization o the heat-unit, aiiorded by the shunt circuit through the resistance conductor. Conversely, of course, the reduction in speed will reduce the amount of air delivered by the fan, which will take up the full amount of heat supplied by the heat-unit, and Vthus will be delivered through the screened oriice at a higher temperature. This, of course, is quite independent ofthe use of additional sections of heating conductor, if such are desired.

By reason of the described switching arrangement, whereby the resistance conductor is cut into circuit only after the fan motor is started, it will be seen that it is normally impossible to overheat the resistance conductor so that there might be dange: of fire, or atleast, injury to the hair drier. Innsmuch as the fan motor must first be started, therewill be provided sufficient air-currents to conduct away the excessive heat at any desired speed, either with one or more sections or heat-units subsequently connected in circuit. lVth the rovision of an additional exposure of resistance conductor, the device may be used for certain hot air treatments. while the speed regulation described, gives both a high and a low range for variable heating effect for the air currents.

Accordingly, 'the hair drier above described, is shown to be one which is very easily regulated and controlled in a novel ,mannen and I therefore claim and desire to secure the features thereof, as follows 1. In a device of the class described, the

combination with an electrically-operated fan, of a laterally positioned nozzle therefor, a heat-insulating lining Within the nozzle, and an electric heat-unit mounted tangentially vat an angle within said nozzle, comprising two insulating heat-resisting side-pieces, similar spacing members therebetween, and a resistance conductor wound in double ladder-like arrangement transversely of said side'pieces, substantially as set forth.

2. In a device of the class described, the combination with an electrically-actuated fan, of an associated electric heat-unit; the same comprising longitudinally grooved side-pieces formed from an insulating-heat resisting material, spacing-members of similar material therebetween.v and a resistanceconductor wound in doubleladder-like arrangement transversely of lsaid side pieces and a nozzle wherein said heat unit is tangentially positioned with respect to the fun, substantially as set forth.

ivan ther-85? a eec mit posfiomd at an angie w .J wary afce of said fam? compius-Mating heat-resisting sida-pin" wila? spng membes connectw 'ie ogeh, anc?. yes Smm@ Comu ransveysey of said sc'e-peces, substanav .w as Sei; fah.

im testimony whereof "i aix my slgna'ra in presence al *mo witnesses.

w LAWRENCE. 

